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NTIS

09/14/2010

Collation

132p

Abstract

The Susquehanna River Basin Commission (SRBC) used a water quality index (WQI) and the U.S. Environmental Protection Agencys (USEPAs) Rapid Bioassessment Protocol III (RBP III) to assess the chemical water quality, biological conditions, and physical habitat of 53 sample sites in the Interstate Streams Water Quality Network from July 1, 2003, to June 30, 2004. Ninety-nine out of 1,001 possible parameter observations exceeded water quality standards. Assessment results indicate that approximately 41 percent of the sites supported nonimpaired biological communities. Water quality impacts in the New York-Pennsylvania border streams tend to be mostly from metals, while most Pennsylvania-Maryland border sites have higher nitrogen and nitrate values in addition to some elevated metals.

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